| 1121 |
Deficiency of vitamin B₁ (thiamine) causes: |
Agriculture
Biomolecules |
Medium |
| 1122 |
Amylase, which breaks down starch using water, belongs to which enzyme class? |
Agriculture
Biomolecules |
Hard |
| 1123 |
The main storage carbohydrate in plants is: |
Agriculture
Biomolecules |
Easy |
| 1124 |
The fungal cell wall is mainly made of: |
Agriculture
Micro-organisms |
Easy |
| 1125 |
Rod-shaped bacteria are called: |
Agriculture
Micro-organisms |
Easy |
| 1126 |
The antibiotic streptomycin is obtained from: |
Agriculture
Micro-organisms |
Medium |
| 1127 |
Which feature is true of viruses? |
Agriculture
Micro-organisms |
Medium |
| 1128 |
Anabaena and Nostoc, which fix nitrogen in rice fields, are best classed as: |
Agriculture
Micro-organisms |
Hard |
| 1129 |
Conversion of ammonium to nitrite in soil is carried out by: |
Agriculture
Role of micro-organisms |
Easy |
| 1130 |
The products of yeast fermentation of glucose are: |
Agriculture
Role of micro-organisms |
Easy |
| 1131 |
Which organism fixes nitrogen while living freely in the soil, without a host plant? |
Agriculture
Role of micro-organisms |
Medium |
| 1132 |
Wheat straw added to soil decomposes slowly mainly because it has a: |
Agriculture
Role of micro-organisms |
Hard |
| 1133 |
Loss of soil nitrogen as N₂ gas under waterlogged conditions is called: |
Agriculture
Role of micro-organisms |
Medium |
| 1134 |
The setting of milk into curd is due to: |
Agriculture
Role of micro-organisms |
Easy |
| 1135 |
The single cotyledon of a maize grain is called the: |
Agriculture
Seed structure |
Easy |
| 1136 |
In a monocot seed, the sheath that protects the plumule is the: |
Agriculture
Seed structure |
Medium |
| 1137 |
The protein-rich outer layer of the endosperm in cereal grains is the: |
Agriculture
Seed structure |
Medium |
| 1138 |
The scar on a seed marking where it was attached to the fruit is the: |
Agriculture
Seed structure |
Easy |
| 1139 |
In which crop do the cotyledons come above the soil during germination? |
Agriculture
Seed structure |
Hard |
| 1140 |
Food in a gram (chickpea) seed is stored mainly in the: |
Agriculture
Seed structure |
Easy |